Abstract:
Apparatus for output in combination of an image data signal and a corresponding bias signal in a linear CMOS sensor is provided. The apparatus comprises enabling circuits for enabling first switch devices of the photocells. Each first switch device is on a bypass of an access from the photocell to a second switch device and the second switch device on an access for the photocell to a common bus. A method for output in combination of an image data signal and a corresponding bias signal in a linear CMOS sensor of a scanner is provided. The method comprises providing photocells arranged in a row that each photocell has an access to a common bus controlled by a corresponding first switch device. Each photocell further has a bypass of the access controlled by a corresponding second switch device. The first switch devices are enabled by a plurality of control lines that each control line is from a corresponding AND gate that makes AND operation for a corresponding pixel select line and a common reset line.
Abstract:
A method for generating a calibration curve is disclosed. The method comprises the following steps. Calibration data of one image line of previous scan are firstly provided. Reference pixels are selected from the image line. Then a calibration board is scanned and calibration data of the reference pixels are generated. Calibration data of the reference pixels of previous scan are then selected from the calibration data of one image line of previous scan. Ratios of the calibration data of the reference pixels and the calibration data of the reference pixels of previous scan are calculated. Calibration data of all pixels of the image line are finally generated by multiplying the calibration data of the image line of previous scan and the ratios.
Abstract:
An image processing method for facilitating data transmission is provided. An image compression method is performed to convert X-bits binary digital signals to a binary compressed data in a floating-point form of (1.n)* 2m. Bit m represents the first bit with logic level null1null of the X-bits binary digital signals, and n represents the bits taken from the X-bits binary digital signals after the bit m. The binary compressed data in the floating-point form of (1.n)*2m is outputted with a sequence of binary number representing a set of (m, n). The latter n bits of the sequence of binary numbers are consisted of the n bits of the X-bits digital signal. Therefore, by the present image compression method, the transmission amount of image data is reduced. The transmission time of image data and the volume of a memory for storing the image data are also reduced.
Abstract:
A method for selecting a shading correcting line is provided. Scanning a white reference source to obtain several scan lines. Averaging brightness values of pixels from identical columns in the scan lines to obtain a new scan line composed of pixels having median brightness values. Adding one count in shading counting number when an absolute value of a difference of the median brightness values between each pair of adjacent pixels in the new scan line not less than a specification value of shading definition. Selecting the new scan line as a shading correcting line when total shading counting number less than a specification number of shading counts.
Abstract:
The present invention discloses the system and method of a scanning module with an incorporated printer head. The method includes using a scanning head of scanner to scan an objects image pattern, using the printer head of scanner to print the object image pattern on a printing paper. Wherein the printer head and the scanning head use the same motor drive and driving component, and uses a control module to adjust the driving mode of the scanning head and the printer head. The system includes a scanning module for scanning an object image pattern, a printing module for printing the object image pattern, wherein the printing module is incorporated in the scanning module, a motor drive for driving the scanning module and the printing module, and a control module for adjusting driving mode of the scanning module and the printing module, thereby showing the object image pattern on a printing paper by using the printing module function.
Abstract:
A method of providing the inputting units of the scanner with a foolproof function. Initially, while a specific inputting unit is activated, such as a push button being pushed, the connection between the operation of the scanner and other inputting units is terminated. This terminated connection is not regained until the specific action, which corresponds to the specific inputting unit, finishes. Moreover, an nullactivationnull message can be directly displayed on the scanner while this specific inputting unit is activated, and while the scanner is processing some specific action, this action can be terminated with the function of the scanner and the connection between all inputting units regained as soon as this specific inputting unit is activated again. For any scanner with the foolproof function, while a specific inputting unit is activated, not only a corresponding specific action is performed but also the connection between the performing specific action and all inputting units is controlled.
Abstract:
A method for increasing signal to noise ratio is disclosed. The method can automatically detect saturation output voltage of the photosensors via adjusting exposure time or illumination intensity so as to obtain optimum output voltage of the photosensors as well as high signal to noise ratio that can generate high quality images.
Abstract:
A filtering method and mechanism for scanners includes a regular visible light source and an infrared light source that are both turned on under a scanner normally on state during scanning operation. A transmission mechanism is provided for reciprocally placing a visible light filter plate and an infrared light filter plate in the scanner light path to filter light emitting from the regular visible light and infrared light source. Changing and switching between regular and infrared light scanning may be done quickly without warm up delay of the light source. More versatile and powerful function thus may be built in the scanner.
Abstract:
A scanning apparatus utilizing gravity acceleration for scanning is provided. The scanning apparatus comprises a U-shaped housing, a shaft bearing, a housing and a scanning head. The shaft bearing passes through the housing with two ends thereof respectively and rotationally fastened on two sidewalls of the U-shaped housing, thereby the housing is vertically and rotationally fastened in the U-shaped housing. The scanning head is disposed in the housing with an engageable piece engaged with a hook-type element of the housing so as to fasten the scanning head at a predetermined position close to the top end of the housing. When the scanning head is going to scan, the engagement between the engageable piece and the hook-type element is released and a starting power is applied to the scanning head by gravity acceleration. Thereby the scanning head is guided to move downward to scan via cooperation between a guiding piece and a guiding rail. The scanning speed of the scanning head is determined by the starting power controlled by a predetermined angle contained between the housing and the U-shaped housing.
Abstract:
In accordance with the present invention, a method for automatically identifying a scan area by a scanner is disclosed. The method comprises steps of scanning an original comprising an object, identifying the original to establish a location and a profile of the object in the original, displaying a preview window corresponding to the original, wherein a location and a profile of a confined area is exactly the location and the profile of the object, receiving a framed area selected from the preview window by user, wherein a portion of the framed area beyond the confined area is automatically removed to generate a scan area, and scanning the scan area. The present invention can also extend to a method for selecting a scan area by a user and a scanner with a feature of automatically identifying a scan area.